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Finding the Fourth Proportional to 669,365, 923,630.74 and 393,735.34

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Solution

The fourth proportional to 669,365, 923,630.74 and 393,735.34 is: 543,300.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,365 : 923,630.74 = 393,735.34 : x
  2. Step 2: Convert to fraction form
    669,365/923,630.74 = 393,735.34/x
  3. Step 3: Cross multiply
    669,365x = 923,630.74 × 393,735.34
  4. Step 4: Simplify right side
    669,365x = 363,666,063,448.35
  5. Step 5: Solve for x
    x = 363,666,063,448.35/669,365
  6. Step 6: Final answer
    x = 543,300.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.